A 128 /spl times/ 128 pixel 120-dB dynamic-range vision-sensor chip for image contrast and orientation extraction

A 128 /spl times/ 128 pixel 120-dB dynamic-range vision-sensor chip for image contrast and orientation extraction

A vision sensor for low-cost, fast, and robust vision systems is described. The sensor includes an on-chip analog computation of contrast magnitude and direction of image features. A temporal ordering of this information according to the contrast magnitude is used to reduce the amount of data delive...

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Veröffentlicht in:IEEE journal of solid-state circuits 2003-12, Vol.38 (12), p.2325-2333
Hauptverfasser: Ruedi, P.-F., Heim, P., Kaess, F., Grenet, E., Heitger, F., Burgi, P.-Y., Gyger, S., Nussbaum, P.
Format: Artikel
Sprache:eng
Schlagworte:
Analog computers
Data mining
Dynamic range
Image sensors
Lighting
Machine vision
Pixel
Robustness
Sensor phenomena and characterization
Sensor systems
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Beschreibung
Zusammenfassung:A vision sensor for low-cost, fast, and robust vision systems is described. The sensor includes an on-chip analog computation of contrast magnitude and direction of image features. A temporal ordering of this information according to the contrast magnitude is used to reduce the amount of data delivered. This sensor, realized in a 0.5-/spl mu/m two-poly three-metal technology, features a contrast sensitivity of 2%, a contrast direction precision of /spl plusmn/3/spl deg/, and an illumination dynamic range of 120 dB. Applications with uncontrolled lighting conditions are ideal for this sensor.
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2003.819169